~/talk

Functional Networking for Millions of Docker Desktops (Experience Report)

Talkat ICFP 2025 · 2025-10-12..10-18· [functional-programming]
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A decade-long engineering saga that ships OCaml unikernels inside Docker Desktop, running Linux as a callable library via a library virtual machine monitor and user-space hypervisor hooks. The team builds a tiny immutable Linux Kit, a custom OCaml storage layer and a reverse network stack (MirageOS/VPNKit) that rewrites Ethernet frames into host sockets, fixes enterprise firewall surprises, and scales to hundreds of millions of downloads and billions of images while moving from Lwt to effect-based direct-style IO.

AI-written summary · about

  1. 0:00Docker overview and evolution
  2. 3:13Linux as a function call
  3. 7:06Docker Desktop architecture
  4. 13:26Hidden Linux network problem
  5. 16:35Functional networking in Docker
  6. 19:03Performance with direct IO
  7. 20:28Summary and future
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